The Virus Hunters: Finding animal diseases before they infect humans

Researchers wearing all-white protective gear pose on a green hillside in Sierra Leone.

More than 60 percent human viruses originally come from animals.

For the past decade, these researchers around the globe have been working to identify risky viruses before they infect humans.

The team found a new Ebola virus in bats in Sierra Leone, and has worked with various communities to reduce exposure.